1979 Yamaha GT 80

[RW3productions]

I'm restoring my fathers 79 gt80 rigth now, I'm putting a new cylinder, crank, crank bearing and a top end. Most of the electrical needs to be checked too.

[Mrengineerwannabe1]

my nieghbour had one idenitacle to this.

that was when he was 13, he's 40 some now.

[summerfest1mike]

So i got the bike running (sort of) and i cant get it to stay running i cleaned the carb and i got a half lap around a tennis court but ever since then it just goes for a milla second but before i cleaned the carb i couldnt go anywere but it would run for about 2 minutes so what should i do

[mitchell8934]

@summerfest1mike New spark plug. Clean the carb again. New fuel. Clean the filter inside the petcock(fuel switch under tank), clean air filter, and tune carb. What spark plug are you running? I think it should be a b7hs (NGK).

[theroadbeckons]

My first bike was an almost identical 77, we were rebuilding them and selling them for their original purchase price when they were 10 or more years old' beautiful little bikes, very high quality kids bike, and I hope nobody got a custom built tire, just relace the hub to a current size rim,I'd still in 2012, pay original purchase price,(cdn$733.33 ,1977) for a good one

[elyoi]

pana yo tngo una gt 80 pero tengo el carburador malo que carburador le puedo colocar porq el original no lo consigo

[mitchell8934]

@elyoi ahhh English? what language is that?

[GGBULLETz]

street legal ?

[mitchell8934]

@GGBULLETz Can be, I'm not sure what happend to the lights but I purchused the battery, wireing harness and speedo hoping to restore the bike. I've since lost intrest in the bike because it keeps losing compression and costing too much. So yes it can be street legal, but the front tire would need to be custom made because it's not manufauctured anymore. It would be to hard to make it roadworthy.

By the it's sorta for sale, local delivery/pickup

[colta51]

@mitchell8934 do you want to sell the lights, battery and speedo? im willing to pay the post..

[mitchell8934]

@colta51 Unfurtunatly I sold all that and the bike about 6 months ago.

Sorry.

[johnathan99999999999]

go and have a look at a Kawasaki H1 500 that is a 2 stroke

[johnathan99999999999]

my one look like your one

[johnathan99999999999]

it works my dad do help me fix it and allso it the motor was needed fix on the clutch i did clean it them it work

[mitchell8934]

ok.

[johnathan99999999999]

i 1st got it it did not have the Exhaust Pipe and it was outside a long time i have to fix the seat and it did not have the seat cover

[mitchell8934]

oh ok... stick some vids up of yours

[johnathan99999999999]

it may be it 72cc i do have one i did got it for free!

[mitchell8934]

yeah they are 72cc but mine has been rebored a fair amount. I got this one

for free too!

[maluchman1]

is this an 80cc?

[cantonhockey1]

real nice bike... i have the same exact one except i have the headlight taillight turn signals and stuff...

[mitchell8934]

thanks! that's how I got the bike. I am slowly getting stuff like I just got a speedo for it and a wireing harness. put some vids up of yours, wouldn't mind checking it out.

[cantonhockey1]

yeah sure. I will try to get one tomorrow

[cantonhockey1]

oh sorry i couldn't get one until now it is low quality (cell phone) but anyways i put it up

[Fannar95]

rlly nice :) i have '79 yamaha MR 50, wich i cant find anything about on the internet. do you know of any sites that i might find anything about the bike? and maybe where i can buy some spareparts for it, i want it to be original

[mitchell8934]

sorry for the late reply i was away. but i had a quick look around and couldnt find much on those. parts are probally just going to be genuine or ebay. thats where i get mine.

[KartRacer695]

79 Yamaha MR50? MR50 is a honda bike not yamaha

[mitchell8934]

lol he fails then

[cantonhockey1]

is this a 2 stroke?

[mitchell8934]

yes

[sanbrunocali]

yes its a two stroke its a 1979 4 strokes were way two heavy to use in bikes up until a couple years ago plus that sound is so unmistakeable

[cantonhockey1]

Yeah i figured it was, but it is oil injected i found out... my mom has one and i thought that we were totally abusing it because we only put gas in it.

[mitchell8934]

THANKS!

[demonfella666]

How do you change gears on one of these?

[mitchell8934]

well it is all 4 up. if u are trying to change gears on these bikes when it is not running u need roll forward a bit so that it engages each gear. do u have one?

[demonfella666]

Do you clutch all of them? and yes i do have a Dt 80.

[mitchell8934]

well yeah thats what ur meant to do with anything really haha. some race cars/bikes are setup to use clutchless shifting for any gear except like 1st and 2nd. being an old and tired bike u should always use the clutch so u dont break anything. theres no point in not using the clutch unless its broken or ur hand is busy u should just use it.

put some vids up of ur bike

[demonfella666]

ok ill have to wait another week or so until the rebuild is done

[demonfella666]

Can you put some pictures up or maybe a video of your wiring setup ? pretty please

[mitchell8934]

not much wiring left on mine. only one coming out of the magneto/flywheel and that goes into another wirer thing. i will do a shirt one vid when i can be botherd

[mitchell8934]

hey a wirering harness is coming for my bike so ill try to make a vid of that to show you..if u still need it. hows urs coming along??

[iain9215]

my gt80 is like a twin to that one , know where i can get parts ?

[mitchell8934]

depends where you live for parts, and what you want. i just go to frankston yamaha and order them. they tell me if they can get it and most of the time they can. but, alot of things are getting harder to get and more expensive. they cannot get a front tire for the bike. they called places like bridgestone and they said they dont make it :( better look after that tire haha. im always looking on ebay for parts too. make sure if u look on there to type GT80 and on another search GT 80.

[KartRacer695]

nice bike i got one to, check to out.

[mitchell8934]

already seen it but urs is diff year same engine tho

[KartRacer695]

yea mine is 77'

[robieskool]

nice bike it looks good....ive got a gt 80 aswell it needs new rings it use to be fast as

[mitchell8934]

yeah mine somtimes runs good and somtimes runs like a heap of crap i think its just a matter of tuning it right

[robieskool]

yeah mine runs like a pig..i hav also got a 1979 yamaha mx 80 it runs great it is good for monos

[mitchell8934]

well ive got the gt going good now i just backed the fuel petcock off a bit because it was running rich and it flies now. yeah i manage to mono this but they are more for onroad where as the mx is more for offroad.

check out my other vid of it riding

[bdaddy23]

sweet bike did you restore it all yourself?

[mitchell8934]

well it's not exactly restored. this was the best it looked just after i had painted the engine and gotten my seat restored (it had split in half)

when i got the cycle it had been sitting in a shed for god knows how long and didn't run. it had no compression so new gaskets and rings also a re-hone and off she went. so yeah its nowhere near perfect and i spose i still thrash the old girl offroad quite regularly.

[j45007]

I like your bike.

[mitchell8934]

thanks mate

[ermestosobalatronca]

Ha HA buddy!!

[mitchell8934]

doesn't look as good as yours hahaha